Two huge RakeMax® Multi-Rake Bar Screens for Oman
Two Giants on Their Way to the Orient
- Screen assembly
- Giant RakeMax® screen on the hook
These giants RakeMax® screens are 19.3 m tall 1.25 m wide and have a bar spacing of 20 mm. They are the tallest screens we have manufactured and supplied so far. They will be installed in a wastewater pump station in Muskat, Oman at an angle of 75°. They pre-screen wastewater before it is pumped to the largest membrane bio-reactor (MBR) plant worldwide that is presently under construction.
The Sultanate Oman is a country on the Arabic peninsula, south-east of the United Arab Emirates, east of Saudi-Arabia and north-east of Yemen. Its south-eastern coast faces the Arabic Sea and its north-eastern coast the Gulf of Oman. Stretched along the gulf coast is Muskat, the capital with a population of 850,000. Two kilometres south of the city, in Al Ansab, the capital’s wastewater treatment plant is under construction. Its headworks and sludge treatment will also be provided with HUBER equipment.
An average flow of 4 m³/s and a peak flow of 6 m³/s is pumped to the new plant from a pump station in Azaiba where our giant RakeMax® screens will be installed. After passing the screens, the wastewater is lifted by 17 m. Our screens protect the pumps from becoming clogged or damaged by coarse solids. Our RakeMax® screens are the ideal solution for this challenge because they easily lift the largest amount of screenings from such a great depth.
Of course, such huge screens can not be shipped in one piece. Their frame is provided with two flanged connections along its length, so that each frame is shipped in three pieces. The pieces are then reassembled on site before installation. The photo shows one of the RakeMax® screens in our factory during assembly and before test-running and disassembled for shipment. As can be seen, the screens have a rigid and self-supporting frame that does not bend under its own weight, which is a heavy 5,600 kg.
The assembly process in the factory has been documented, photographed and described in detail to provide excellent assembly instructions for the contractor. This is necessary because these giant screens, due to their size and weight, must be assembled and installed on site in a particular way.
by Peter Brüchner and Harald Plank, Project Managers in our Business Unit Mechanical Treatment
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